The story
The club was founded in April 1947 in the dressing room of comedian Jimmy Edwards at the Windmill Theatre in London. There were 10 founder members, including Edwards, Raymond Glendenning, and Frank Muir. The minutes of that first meeting are in the Club archives and it appears that although there was a goodly number of founder members they were outnumbered by chorus girls.
The object of the club was, and still is, to bring together moustache wearers (beards being strictly prohibited) socially for sport and general conviviality. The aim of the club was to assist by all means at its disposal, any worthy charity or cause, particularly those devoted to ex-servicemen. This aim still remains today and it has helped particularly with children's charities.
From Wikipedia’s article on Handlebar Club, shared under CC BY-SA 4.0.3
